Looks great. I don’t see any issues with fit.
I watched a video by some Russian guy that made a tumbling design like yours but did it by putting strips together like you would for a chessboard pattern. That greatly reduces the glue up mistakes and cuts the assembly time so you can get clamps on it quickly. The downside is each of the diamonds is 2 pieces, so it’s a little different.
Just found the video.
Losing fingers since 1969